Paint and varnish remover.



AUGUST 13. mmvsrnnr, or BENsoN-EUns'r soar & OIL 00., Inc, on NEW YORK,

No Drawing.

To all whom it may concern: I Be it known that I, AUeUs'r E. NIEN-STADT, a citizen of the United States of America, and a resident ofBensonhurst,

county of Kings, and State of New York, have invented certain new anduseful. Im-

' provements in Paint and Varnish Removers, of which to the treatment ofcertain solvents. However, railroad cars and certain wood works havevertical Walls with painted or varnished surfaces and actlve solventsknown to I soften the paint or varnish and take it' up so that it may beremoved.-

are easily flowing. Accordingly the active solvents will not stay on apainted or varnished vertical surface for a sufiicient length of time torender possible the removal of the paint or varnish. For this reasonsuch paint and varnish removers contain a vehicle adapted to form withthe solvents a seml-liquid or creamy substance. The vehicle increasesthe consistency or viscosity of the varmsh remover. If such a semiliquidvarnish remover is applied to a vertical surface or even a ceiling itwill stay thereon and soften and dissolve the varnish Various substancesare employed to a vehicle for the active solvents but none of themappears to have given entire satisfaction because the substance orsubstances forming the vehicle have been selected for the purpose ofthickening the remover and i usually permit .of an undesirably; quickevaporation of the active solvents. As a consequence the full efiect ofthe active solvents is. not attained and the remaining vehicle hasnoeffectv on the varnish.

The present invention has for its purpose to produce a paint and-varnishremover inwhich the described defects have been avoided. This has beenprimarily attained by selecting such substances forthe vehicles and suchsolvents which produce a semiliquid or creamy paint and varnish removerSpecification of Letters Patent. Application filed September 25, 1914.Serial No. 863,462.

act as" N a tit NEW roan, assrcivon 'ro srncmlca'r on 1\T. Y., aconronazrron or NEW roan.

PAINT AIlVD VARNISH REMOVER.

Patented June is, 1915.

and retard the evaporation of the active sol vents sufliclently forobtaining their value to a very high degree. Furthermore, one or theother component of the vehicle may act as an auxiliary means forsoftening the paintor varnish which increases the efficiency of theremover. It is also impor tant that corrosive strongly caustic or acidsubstances do not form preponderant components of a pai nt and varnishremover because such substances destroy and discolor the surface of thewood which renders it difficult to apply a newcoat of varnish and asrather transparent varnishes with a lazy surface are sometimes used, thedisco oration of the surface of the wood implies anunsightly appearance.

carrying my invention into effect I substantially proceed as follows:First I mix the solvents, absolute methyl alcohol or as it is commonlycalled. wood alcohol, acetone,'be nzene, C H or asitformerly was calledbenzol and ammonia water of 26 B.

Now naphthalene, ammonium stearate and caster-oil are incorporated withthe mixture of solvents and the entire mass is gently heated until thenaphthalene,. ammonium stearate and caster-oil are completely dissolvedand the mass forms a solution. The a solution is agitated while coolingto disturb the crystallization-of the naphthalene. The free ammoniaforms with the castoroil a soft soap which is soluble in the solvents.This caster-oil ammonia soap tends to keep the mixture of ammonium'stear to and naphthalene in suspension and ke ps the formerly solidsubstances from; separation. The resulting product is a I semi liquid,creamy composition. r

The proportions in which the components are used may vary withinreasonable limits for various applications-according to the compositionof the paint and" varnish'to be 1 removed. Furthermore less body carrieror vehicle is required in winter than in summer. removal ofv the usualvarnishescontain's sub; stantially thefollowing percentages ofcomponents, all parts by weight: About 7% parts of absolute methylalcohol, 7% parts of acetone, 15 parts of benzene, and 2 parts ofaqueous ammonia of 26 B. To these sol-' Oneformula which answers for theI vents about 4 parts f naphthalene, about 8-parts of ammonium stearateand about 2 parts of castor-oil are added and the mixture is heateduntil a uniform solution has been obtained.

The solvents employed in the present remover all have a relatively lowboiling point. Wood alcohol boils at 648 (1, acetone at 563 C. andbenzene at 80.36 C. These temperatures show that the solvents easilyevaporate at normal temperature.

when spread out. For this reason it is essential to retard theevaporation. The castor-oil soap formed aids in retarding evaporation.The naphthalene, C H although a solid substance is a pure hydrocarbon,and therefore tends to act as an auxiliary solvent while giving body tothe composition. The ammonium stearate is a salt and as a solidsubstance gives body to the composition. Thus the novel varnish removerutilizes the dissolving 'power of the active solvents to a very highdegree.

I claim as my invention:

1. A paint and varnish remover constituent ingredients of which areabsolute methyl alcohol, acetone, benzene, some weak aqueous ammoniumsolution, some castor-oil, and a thickening vehicle adapted to produce asemi-liquid, creamy composition.

2. A paint and varnish remover constituent ingredients of which areabsolute methyl alcohol, acetone, benzene, some Weak aqueous ammoniumsolution, and some Castor-oil, naphthalene and ammonium stearate as athickening vehicle for the active solvents.

3. A paint and varnish remover constituent ingredients of which areabout 79; parts of absolute methyl alcohol, about 7% parts of acetone,about 15 parts of benzene, about 2 parts of castor oil, about 2 parts ofaqueous ammonium of 26 B., about 4 parts of naphthalene, and 8 parts ofammonium stearate.

Signed at NewYork, N. Y., this 23d day of September, 1914.

AUGUST E. NIENSTADT.

Witnesses:

CHARLO'I'IE C. KRICHNER, IDA E. ROLAND.

